It was, for a time, T7. Then something clicked and his personality started to grate on me. He's always so gosh darn upbeat!

So Id have to settle for Kira Carsen or perhaps Khem Val. Especially:

Spoiler

after he saved the Sith Inquisitors arse from Darth Zash.

"Weakling! You will never reach your potential if you falter at the slightest obstacle. Beyond that wall lies your destiny. Beyond that wall lies the full power of the dark side. If you do not have the strength to reach it, then you do not deserve to become a Sith sorcerer!"